I'm following this guideline on setting up droidcam so I can use my android phone as a webcam, the first two scripts run okay but when I run sudo apt-get update there's an error related to the installation

E: Failed to fetch http://ppa.launchpad.net/paolorotolo/droidcam/ubuntu/dists/xenial/main/binary-amd64/Packages  404  Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.

This software is kind of old, and may not work on newer Ubuntu installations.

Open Software & Updates, Additional Software tab. Find the repository definition that contains paolorotolo and change the OS version from xenial to vivid. Reload the software database when exiting. You should be able to install droidcam now.

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